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Our investment principles Summary

Asset Allocation

Asset allocation (simply the mix of investment types that you hold) is the most important factor affecting the level of risk and likely return that you might achieve when investing over the long term. If you hold most of your money in cash then your chance of losing money is low, but returns will also be low and might not keep pace with inflation. If you invested most of your money in stocks and shares then the chances of a greater return are higher over the longer term, but the chances of suffering losses in the short term are also higher.


The following chart represents a study* conducted in 1991 to establish where the variability of investmentreturns come from.

A further study** indicated that for the long term individual investor, who maintains a consistent asset allocation and leans towards index funds, asset allocation determines close to 100 % of performance.

*Source: “Determinants of Portfolio Performance II: An Update”, Financial Analysts’ Journal May/June 1991
**Source: Ibbotson and Kaplan Financial Analysts Journal Jan/Feb 2000

Common sense dictates that you should not put all your eggs in one basket, but how do you decide what assets to invest in and what proportion?

Our research indicates that the most reliable method is to look at long term trends for different asset classes and then try to understand how capital markets reward the different levels of risk taken and how these returns are correlated. We then build diversified asset class portfolios based on the following principles: -

Active versus Passive Investment Strategies

Active fund managers try to beat the market through the selection of the investments they hold and timing their entry into and exit from the market. However, the efficient market hypotheses suggests that markets are efficient as they reflect all available information and therefore the market price is what people are prepared to pay at that time.

Prices change due to unforeseen events or market momentum; however, any miss-pricings are not in predictable patterns that can lead to consistent outperformance.

Active stock selection can lead to greater risk and volatility to the market. In addition, this generally leads to significantly higher costs in order to pay for the active management. An active manager will argue that they offer the potential to beat the market, whilst just tracking a market through some type of index tracker will only follow the market.

However, most active managers fail to beat the market average; partly down to their costs and partly down to the difficulties in trying to predict future events. Some active managers do beat the market over certain timeframes when their selections come good; however, our research demonstrates that few of these managers repeat that performance over time.

Before costs, the market return is a zero sum game meaning that for every investor who beats the market average, another investor had to underperform the market. Everyone cannot beat the market, as they are the market. Returns can be random and difficult to predict consistently.

Therefore, our research indicates where possible, the most efficient and lower risk approach is to accept market returns using index trackers at the minimum possible cost.

Portfolios should be diversified and structured for different objectives through the asset allocation policy not built on a more speculative basis. Below is a demonstration of this via our WWM 40/60 Global Portfolio, WWM 60/40 Global Portfolio and WWM 80/20 Global Portfolio using index trackers: -

Growth of wealth Monthly 1/4/2008 - 31/3/2020

Gowth of wealth
Performance data shown represents past performance and is not a guarentee of future results. Current performance may be higher or lower than the performance show. The investment return and principle value of an investment may fluctuate so that an investors shares, when redeemed, may be worth more or less than their origional value. To obtain performance data current to the most recent month-end, visit dimentional.com. Average annual total returns include reinvestment of dividends and capital gains.

Monthly Performance data represents past performance 1/4/2008 – 31/03/2020. Past performance is no guarantee of future results and current performance may be higher or lower than the performance shown. Performance includes reinvestment of dividends and capital gains. Full details of calculations can be provided on request. UK inflation rate provided by the Office for National Statistics in the UK; Crown copyright material is reproduced with the permission of the Controller of HMSO. Figures for IMA sectors are calculated by Investment Management Association using Lipper data for individual funds.